Firefox 3.1 Beta 3 is based on the Gecko 1.9.1 rendering platform, which hasbeen under development for the past 9 months. Firefox 3.1 is an incrementalrelease on the previous version with significant changes to improve webcompatibility, performance, and ease of use:

* This beta is now available in 64 languages - get your local version. * Improved the new Private Browsing Mode. * Improvements to web worker thread support. * Improved performance and stability with the new TraceMonkey JavaScriptengine. * New native JSON support. * Improvements to the Gecko layout engine, including speculative parsing forfaster content rendering. * Support for new web technologies such as the and elements,the W3C Geolocation API, JavaScript query selectors, CSS 2.1 and 3properties, SVG transforms and offline applications.